S Substance composition and concentration in the air will be determined by substance amount which emission by its resources. Various activity type of natural activity and also anthropogenic which emission the pollution substance will alter thanthre air quality. Activity transportation, especially motor vehicle represent the activity anthropogenic anticipated as major source of air pollution in metropolitan town.Nitrogen oxide (NOJ consisted of N02 and NO come from fuel combustion of high temperature. Nature gas N02 is brownish red and very smelt sting the nose, while gas NO do not color and odorless. The most sensitive body organ to gas N02 is lung. PM10 have size measure 0.1 µm till 5-10 µm. Emission source of PM10 generally coming from motor vehicle. Particle coming from vehicle's tire usually has diameter less than 1 micron. Its impact to environment among other things can lessen the sight distance. Meteorology factor playing a part to determine the air quality that is wind circulation, weather, air stability, rainfall, humidity and sunshine,Base on measurement result in field, obtained by concentration data NOx, N02, PM1o, car volume, car speed and ineteorology factor; From third measurement location, average concentration of NOx, N02 and P!\110 l(lid bay lecatien of lower average concentration at Imam Bonjol location. Result of liilear regression analysis of total car to concentration of NOx and N02 indicate that car using gasoline has a significance influence ( < 0.05) and strong enough to NOx and N02 (R2 >0.5). Whereas linear regression analysis of total car to PM10 concentration indicate that gasoline and solar car influence significantly to PM10 concentration. NOx concentration in three locations at certain times there was cars that pass the quality standard. And nothing passes N02 and PM10• ISPU calculation for the concentration of PM10 from third location measurement that is Pandanaran, Imam Bonjol and Setiabudi obtained value equal to 70.66, 56.89 and61.49 which is included in middle category whereas the NO concentration is lowest. Base on the comparative graphic between field and calculation indicate that concentration result of calculation in day is smallest compared with concentration in the field, besides we can conclude that the most total car the higher NOx, NO; and PM10 concentration. Whereas the comparative graphic between field and calculation indicate that concentration result of calculation in night is highest compared with concentration in the field, besides we can conclude that the most total car the higher NOx, N02 and PM10 concentrationPursuant to result of measurement of concentration of air pollution hence needthe efforts of control the air in the location, among them air pollution monitoring installation, use environmental friendly fuel as well as done emission tune up test at the car periodically